It's still a few months before Kristen Bell will be welcoming her first child with fiancé Dax Shepard into the world.

But the Forgetting Sarah Marshall actress is already celebrating the impending arrival, and was seen enjoying a baby shower surrounded by some of her celebrity friends last weekend.

Having fun at the event, Kristen shared a picture of herself joking around by holding a breast pump up to her cleavage, while pouting for the camera.

Express yourself! Kristen Bell joked around with a breast pump as she celebrated her baby shower over the weekend

In the image, the 32-year-old actress
is seen wearing a patterned pink dress, with her blonde hair half swept
away from her face in a half-up, half-down 'do.

Kristen is seen sitting with a box of presents on her lap, with several balloons marking the occasion in the background.

The former voice of Gossip Girl had earlier tweeted her excitement about the occasion, which was attended by her close friend Rachel Bilson as well as her House of Lies co-stars Ben Schwartz and Josh Lawson.

Here come the boys: Kristen was joined for the occasion by her House Of Lies co-stars Ben Schwartz and Josh Lawson

Star-studded: Rachel Bilson also attended the event, and was seen clutching a fox toy for Kristen along with some other presents as she made her way inside

She humorously captioned the shot of herself with the two men by writing: 'All my best girlfriends came to my baby shower!'

Kristen has been using Twitter to
keep her fans updated on her pregnancy. Earlier this month, Kristen
shared an image of her dog cuddling up to her pregnant tummy, writing: 'Some people are more excited than others about the baby filling'.

Kristen and her fiancé Dax, 38, have been together since 2007, and the pair co-starred in a
comedy action film all about driving fast last year, Hit and Run.

Pleased to meet you: Earlier this month, Kristen tweeted a picture of her dog resting his head on her pregnant belly

Loved up: The parents-to-be kissed frequently at The Golden Globes, and Kristen tweeted, ''Wish us luck on our nomination for most PDA!'

Comedian Dax is well known for being a petrolhead, and he directed the movie, which focused on a car chase.

The loved-up couple have been engaged
for almost 3 years and are happy to have their first baby out of
wedlock, saying they won't tie the knot until same-sex marriage is legal
in their home state of California.

Last
year Kristen said: 'The reason we're not rushing to get married is
because I don't feel appropriate taking advantage of a right that's
denied to my [gay and lesbian] friends.

'That's
why we've been so hesitant. Dax and I have talked about it a lot, and
this issue is very important to both of us. We're just standing up for
what we believe in.'